After a certain medicine is ingested, its concentration in the bloodstream changes over time. The relationship between the elapsed time, t, in minutes, since the medicine was ingested, and its
concentration in the bloodstream, C(t), in mg/L, is modeled by the following function:
C(t) = 78 · (0.62)
Complete the following sentence about the percent change in the concentration of the medicine.
Every minute,
% of concentration is
added to v
the total concentration of the
medicine in the bloodstream.

answer: hey there,

the answer you are looking for is a..

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x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x